Keynote Speakers
Prof. Mohamed Abdel-Hady Gepreel
Prof. Mohamed Abdel-Hady Gepreel
Egypt-Japan University of Science and Technology
Speech title: Recent trends in the design, phase formation and properties of low-cost high entropy alloys
Abstract: New category of alloys is the High-entropy alloys (HEAs) that contain five or more principal elements in equal or near-equal percentages with high configuration entropy (ΔSconf > 1.5 R, where R is the gas constant). Different methodologies to design new HEAs are applied. The phase equilibrium prediction by commercial software like ThermoCalc is a useful tool for researchers. Also, the empirical relations between metastable phases formation, alloy properties and the thermodynamic parameters are widely used. Recently, machine learning and artificial intelligence techniques are being developed by many researchers to support medium and high entropy alloys’ design. One of the new HEAs which possesses a good combination of low-cost alloying elements, has single FCC solid solution structure, good cold workability and mechanical properties is Al5Cr12Fe35Mn28Ni20 alloy. The design considerations to strengthen Al5Cr12Fe35Mn28Ni20 HEA with alternating the Al, Mn, Fe and Ni content as well as thermomechanical processes will be emphasized. The role of alloying the low-cost HEAs with Si, which is a BCC stabilizer and silicide former, to improve the corrosion and oxidation resistance will be discussed. The modification of the low-cost HEAS with Ti addition to achieve higher mechanical properties at room and high temperatures will be explored as well. Finally, using artificial neural network approach in designing new medium entropy alloys with low Young’s modulus and high strength and corrosion resistance will be presented.
Short Biography:Prof. M. Gepreel got his PhD from Nagoya University, Japan in 2008. He worked in Nagoya University then Tohoku University, Japan, till 2010 when he moved to E-JUST. He works as Professor of advanced materials at E-JUST since 2019. He is specialist in alloy design and microstructure control. He worked in developing New generation of Ti-alloys for biomedical applications, Ultra-high strength Ti-alloys, Negative and zero thermal expansion alloys and recently developing new functional High entropy alloys. He received the State's Award (Egypt) in Engineering, 2014, beside 17 more national and international awards. He was visiting professors to many well-known institutes, such as; Tohoku University, Japan, IIT-Madras, India, Michigan State University, USA, Korean Basic Science Institute, Korea, Joint Institute for Nuclear Research, Russia. He supervised 16 M.Sc. and 15 PhD thesis. He shared in organizing 15 International conferences. He was invited as Keynote speaker /invited speaker for more than 20 international conferences worldwide. He had 19 funded research projects (national and international) and more than 150 publications [including filed 8 Patents, 5 Book chapters, 67 Journal papers, and 73 international conferences].